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What is Dark Lightning? Researchers studying thunderstorms have made a surprising discovery: The lightning we see with our eyes has a dark competitor that discharges storm clouds and flings antimatter into space. Astrophysicists and meteorologists are scrambling to understand "dark lightning." Find out more on this YouTube video published by: NASA

The remains of the first birds were found in 1861 in a limestone quarry in Bavaria. The second skeleton was discovered in 1877 and almost a century later, in 1956, the third. It is significant that all three skeletons were found at a distance of 15 km. It is believed that all three skeletons belonged to the same species Archaeopteryx lithographica, in short Archaeopteryx. This animal lived 150 million years ago. " Archaeopteryx lithographica (Berlin specimen) " by H. Raab ( User: Vesta ) - Own work . Licensed under CC BY-SA 3.0 via Commons .